Sometimes in the late night I used to receive some text messages to my cell phone and wondered how I block them so they don’t disturb me at the odd hours of the day. For US residents here are few options that you can go to your cell phone carrier and block those specific websites from spamming your cell phone.
By cell phone carrier :
> Log in at mymessages.wireless.att.com.
> Under Preferences – check text-blocking and alias options.
> Configure to block messages from specific e-mail addresses or Web sites.
Note : One user posted this info for corporate accounts with AT&T –
Caveat with AT&T: if you are part of a corporate contract, you can’t register for access to their online account info. I received the following message when I tried to register: “R323: We’re sorry, we are currently unable to accept registration for your account type.”
> Log in at vtext.com.
> Under Text Messaging, click Preferences. Click Text Blocking.
> Configure to block text messages from e-mail or from the Web.
> log in at www.sprint.com
> On the top navigation bar, click My Online Tools. Under Communication Tools, click Text Messaging. On the Compose a Text Message page, under Text Messaging Options, click Settings & Preferences. In the text box, you can enter a phone number, email address or domain (such as Comcast.net) that you want to block.
T-Mobile doesn’t yet offer a “block text messages from the Internet” option. You can block all messages sent by e-mail, though, or permit only messages sent to your phone’s e-mail address or alias, or create filters that block text messages containing certain phrases. It’s all waiting when you log into www.t-mobile.com and click Communication Tools.
Be sure to read the comments in the Pogue’s post to get additional details.
Source : How to Block Cell Phone Spam